1. Movement of a body part toward the back or posterior surface, or the backward bending of a joint, particularly the hand or foot
The dorsal extension of the hand is limited by the extensor muscles on the back of the forearm.
A extensão dorsal da mão é limitada pelos músculos extensores na parte posterior do antebraço.
2. In anatomy, the movement that increases the angle between the dorsum and the plantar or palmar surface
Dorsal extension of the foot is essential for walking properly.
A extensão dorsal do pé é essencial para caminhar corretamente.